
let name1: string = `Gene`;
let age: number = 37;
let sentence: string = `Hello, my name is ${name1}.

I'll be ${age + 1} years old next month.`;
console.log(sentence);
// Declare a tuple type
let x: [string, number];
// Initialize it
x = ["hello", 10]; // OK
// Initialize it incorrectly
let list: any = [1, "23", "c", null];
console.log(list);
function unsuer(): void {
  console.log("hello unused");
}
/*
 * @Author: yanni
 * @Description: //TODO 
 * @Date: 10:57 2019/7/4
 * @Modified By:
 * @Param: 
 * @return: 
 **/